diff --git a/sdk_container/src/third_party/portage-stable/sys-apps/man-pages/man-pages-6.06.ebuild b/sdk_container/src/third_party/portage-stable/sys-apps/man-pages/man-pages-6.06.ebuild
index b6ca71aa68..b7adda947d 100644
--- a/sdk_container/src/third_party/portage-stable/sys-apps/man-pages/man-pages-6.06.ebuild
+++ b/sdk_container/src/third_party/portage-stable/sys-apps/man-pages/man-pages-6.06.ebuild
@@ -98,7 +98,7 @@ src_unpack() {
 		# Upstream sign the decompressed .tar
 		einfo "Unpacking ${P}.tar.xz ..."
 		verify-sig_verify_detached - "${DISTDIR}"/${P}.tar.sign \
-			< <(xz -cd "${DISTDIR}"/${P}.tar.xz | tee >(tar -x))
+			< <(xz -cd "${DISTDIR}"/${P}.tar.xz | tee >(tar -xf -))
 		assert "Unpack failed"
 
 		unpack man-pages-gentoo-${GENTOO_PATCH}.tar.bz2
diff --git a/sdk_container/src/third_party/portage-stable/sys-apps/man-pages/man-pages-9999.ebuild b/sdk_container/src/third_party/portage-stable/sys-apps/man-pages/man-pages-9999.ebuild
index da0221acf2..3650f5532a 100644
--- a/sdk_container/src/third_party/portage-stable/sys-apps/man-pages/man-pages-9999.ebuild
+++ b/sdk_container/src/third_party/portage-stable/sys-apps/man-pages/man-pages-9999.ebuild
@@ -98,7 +98,7 @@ src_unpack() {
 		# Upstream sign the decompressed .tar
 		einfo "Unpacking ${P}.tar.xz ..."
 		verify-sig_verify_detached - "${DISTDIR}"/${P}.tar.sign \
-			< <(xz -cd "${DISTDIR}"/${P}.tar.xz | tee >(tar -x))
+			< <(xz -cd "${DISTDIR}"/${P}.tar.xz | tee >(tar -xf -))
 		assert "Unpack failed"
 
 		unpack man-pages-gentoo-${GENTOO_PATCH}.tar.bz2